Add UI checkbox for colour

Samples/AudioPreprocessing/WinUI/AudioPreprocessing/AudioPreprocessing/MainWindow.xaml

@@ -11,18 +11,18 @@
     xmlns:muxc="using:Microsoft.UI.Xaml.Controls"
     mc:Ignorable="d">
 
-    <StackPanel Margin="0,0,0,0" Background="White" Orientation="Vertical">
+    <StackPanel Background="White" Orientation="Vertical">
+
         <Button Name="ShowFilePickerButton" Content="Open file" HorizontalAlignment="Center" Click = "OnOpenClick"
-            VerticalAlignment="Center" />
-        <TextBlock Name="WavFilePath" HorizontalAlignment="Center"
-            VerticalAlignment="Center"  />
+        VerticalAlignment="Center" />
+        <CheckBox x:Name = "ColorMelSpectrogramCheckBox" Margin = "10" Content = "Check to render Mel Spectrogram with color" HorizontalAlignment="Center"/>
+        
+        <TextBlock Name="WavFilePath" Text="{x:Bind ViewModel.AudioPath}" HorizontalAlignment="Center" VerticalAlignment="Center" />
         <Button Name="SaveFilebutton" Command="{x:Bind ViewModel.SaveFileCommand}" Content="Save file" HorizontalAlignment="Center"
             VerticalAlignment="Center" />
-        <TextBlock Name="ImagePath" Text="{x:Bind ViewModel.ImagePath}" HorizontalAlignment="Center"
-            VerticalAlignment="Center" />
+        <TextBlock Name="ImagePath" Text="{x:Bind ViewModel.ImagePath}" HorizontalAlignment="Center" VerticalAlignment="Center" />
 
-        <StackPanel Margin="0,0,0,0" HorizontalAlignment="Center"
-            Background="White" Orientation="Horizontal">
+        <StackPanel HorizontalAlignment="Center" Background="White" Orientation="Horizontal">
             <Image Name="spectrogram" Stretch="Fill" Height="500" Width="500" />
         </StackPanel>
     </StackPanel>

Samples/AudioPreprocessing/WinUI/AudioPreprocessing/AudioPreprocessing/MainWindow.xaml.cs

@@ -39,7 +39,7 @@ namespace AudioPreprocessing
         {
             string wavPath = await GetFilePath();
             PreprocessModel melSpectrogram = new PreprocessModel();
-            var softwareBitmap = melSpectrogram.GenerateMelSpectrogram(wavPath, true);
+            var softwareBitmap = melSpectrogram.GenerateMelSpectrogram(wavPath, ColorMelSpectrogramCheckBox.IsChecked ?? false);
 
             ViewModel.AudioPath = wavPath;
             ViewModel.MelSpectrogramImage = softwareBitmap;